Emission analysis of Sm3+:Ca4GdO(BO3)3 powder phosphor

This paper reports on the spectral analysis of reddish orange color luminescent Sm3+:Ca4GdO(BO3)3 powder phosphor. This phosphor powder has been synthesized by a solid state reaction method. Emission spectrum of it has shown four emission transitions of 4G5/2 → 6HJ (J = 5/2, 7/2, 9/2, 11/2) and among them, the transition 4G5/2 → 6H7/2 displays the reddish orange (605 nm) color. Lifetimes of three emissions (4G5/2 → 6HJ=5/2, 7/2 & 9/2) have been computed based on the measured decay curves. Besides the measurement of emission spectrum of this material, its nature and structural details have also been investigated from XRD, SEM and FTIR studies.